GPR-160 Receptor Signaling in the Dorsal Vagal Complex of Male Rats Modulates Meal Microstructure and CART-Mediated Hypophagia.

GPR-160 Receptor Signaling in the Dorsal Vagal Complex of Male Rats Modulates Meal Microstructure and CART-Mediated Hypophagia.
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雄性大鼠背迷走神经复合物中的GPR-160受体信号传导调节粉餐微结构和推车介导的下型。

DOI:
10.3390/nu15102268
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发表时间:
2023-05-11
期刊:
影响因子:
5.9
通讯作者:
Hayes MR
Hayes MR
中科院分区:
医学2区
文献类型:
--
作者:
Sanchez-Navarro MJ;Borner T;Reiner BC;Crist RC;Samson WK;Yosten GLC;Stein L;Hayes MR

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G蛋白偶联受体GPR-160是最近被发现的可卡因和苯丙胺调节转录肽(CART)的受体,在能量平衡控制核团(包括迷走神经背侧复合体(DVC))中大量表达。然而,它在控制食物摄入量中的生理作用还没有得到充分的研究。在这里,我们在雄性大鼠的DVC中进行了病毒介导的、靶向的Gpr160基因敲除(KD),以评估其在控制摄食中的生理作用。我们的结果表明,DVC Gpr160kD影响面团的微观结构。具体地说,DVC Gpr160KD动物在黑暗阶段消费更频繁,但进餐时间更短,在光明阶段卡路里摄入量和进餐持续时间减少。然而,累积起来,这些对喂食的双向影响并没有导致体重增加的差异。接下来,我们测试了DVC GPR-160在介导外源性CART的厌食效应中的作用。我们的结果表明,DVC Gpr160kD部分减弱了CART的厌食效应。为了进一步确定DVC中Gpr160+细胞的特征,我们利用单核RNA测序数据揭示了DVC小胶质细胞中GPR-160的大量表达,而在神经元中只有极少量的表达。综上所述,我们的结果表明,DVC CART信号可能是由Gpr160+小胶质细胞介导的,Gpr160+小胶质细胞可能反过来调节DVC神经元的活动,以控制食物的摄入量。
The g-protein coupled receptor GPR-160, recently identified as a putative receptor for the cocaine and amphetamine-regulated transcript (CART) peptide, shows abundant expression in the energy-balance control nuclei, including the dorsal vagal complex (DVC). However, its physiological role in the control of food intake has yet to be fully explored. Here, we performed a virally mediated, targeted knockdown (KD) of Gpr160 in the DVC of male rats to evaluate its physiological role in control of feeding. Our results indicate that DVC Gpr160 KD affects meal microstructure. Specifically, DVC Gpr160 KD animals consumed more frequent, but shorter meals during the dark phase and showed decreased caloric intake and duration of meals during the light phase. Cumulatively, however, these bidirectional effects on feeding resulted in no difference in body weight gain. We next tested the role of DVC GPR-160 in mediating the anorexigenic effects of exogenous CART. Our results show that DVC Gpr160 KD partially attenuates CART’s anorexigenic effects. To further characterize Gpr160+ cells in the DVC, we utilized single-nucleus RNA sequencing data to uncover abundant GPR-160 expression in DVC microglia and only minimal expression in neurons. Altogether, our results suggest that DVC CART signaling may be mediated by Gpr160+ microglia, which in turn may be modulating DVC neuronal activity to control food intake.
DOI: 10.1016/j.molmet.2021.101422
发表时间: 2022-03
影响因子: 8.1
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